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会员注册我是基于arduino UNO R3套件来实现的RGB三色灯案例。在这整套的套件中，备有RGB三色灯集成器件。
关于RGB三色灯的电路原理，各位直接在网上就可以搜索到，这里就不过多赘述。接下来就是关于RGB三色灯的实例。程序实例和端口请根据实际情况进行调整。
RGB三色灯——流水灯效果：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | #define RED 12#define GREEN 8#define BLUE 7void red(void);void green(void);void blue(void);void setup() { // put your setup code here, to run once: pinMode(RED, OUTPUT); pinMode(GREEN, OUTPUT); pinMode(BLUE, OUTPUT); digitalWrite(RED, LOW); digitalWrite(RED, LOW); digitalWrite(RED, LOW);}void loop() { // put your main code here, to run repeatedly: red(); delay(1000); green(); delay(1000); blue(); delay(1000);}void red(void){ digitalWrite(RED, HIGH); digitalWrite(GREEN, LOW); digitalWrite(BLUE, LOW);}void green(void){ digitalWrite(RED, LOW); digitalWrite(GREEN, HIGH); digitalWrite(BLUE, LOW);}void blue(void){ digitalWrite(RED, LOW); digitalWrite(GREEN, LOW); digitalWrite(BLUE, HIGH);} |
RGB三色灯——呼吸灯效果：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | #define LED_red 11#define LED_green 10#define LED_blue 9void breath(int pin);void setup() { // put your setup code here, to run once: pinMode(LED_red, OUTPUT); pinMode(LED_green, OUTPUT); pinMode(LED_blue, OUTPUT);}void loop() { // put your main code here, to run repeatedly: breath(LED_red); breath(LED_green); breath(LED_blue);}void breath(int pin){ for(int i = 0; i <= 255; i++) { analogWrite(pin, i); delay(5); } for(int i = 255; i >= 0; i--) { analogWrite(pin, i); delay(5); } delay(100);} |
这里要提醒一下各位：在Arduino UNO板上，有pwm输出口，需要各位注意看，并且在这里我是用到了analogWrite(int pin, int value)函数，是arduino函数库中专门用来pwm调试输出的。
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